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You must make sure that this path is writable by QEMU and allowed by SELinux or AppArmor.

> On 07 May 2015, at 10:23, killingwolf <killingwolf at qq.com> wrote:
> 
> 
>   You should make sure the two file writeable.
> 
> ------------------ Original ------------------
> From:  "李沛伦";<lpl6338236 at gmail.com>;
> Date:  Thu, May 7, 2015 03:55 PM
> To:  "openstack at lists.openstack.org"<openstack at lists.openstack.org>;
> Subject:  [Openstack] How can I make my changes of ceph.conf to take effectin Cinder?
> 
> Hello! I'm using Ceph as the backend storage system for Cinder, and I want to change some settings of Ceph client, so I add the following into /etc/ceph/ceph.conf of my compute node A:
> 
> [global]
>   debug ms = 10
>   log file = /var/log/ceph/global.log
> 
> [client]
>   debug ms = 10
>   debug rados = 10
>   log file = /var/log/ceph/client.log
> 
> but after restarting nova-compute and all the VMs on node A, restarting cinder-volume, cinder-api, cinder-scheduler on Cinder controller node B, I created a new volume and attached it to a VM on node A, but there is still no client.log or global.log after I read or write this new volume! Could any one tell me how can my modification of ceph.conf make difference? I make sure that rbd_ceph_conf=/etc/ceph/ceph.conf in cinder.conf on node B, and the data are written into Ceph cluster.
> 
> PS: The [global] section is used just to know whether ceph.conf is useful......
> 
> Thanks!
> 
> --
> Li Peilun (李沛伦)
> Yao Class J10
> Institute for Interdisciplinary Information Sciences
> Tsinghua University
> Beijing,100084
> P.R.China
> Tel:86-18810671857
> E-mail: lpl6338236 at gmail.com
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Cheers.
––––
Sébastien Han
Cloud Architect

"Always give 100%. Unless you're giving blood."

Phone: +33 (0)1 49 70 99 72
Mail: sebastien.han at enovance.com
Address : 11 bis, rue Roquépine - 75008 Paris
Web : www.enovance.com - Twitter : @enovance

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